anonymous 4 years ago how do you find the derivative of (4)/(7x) so that it may equals (-4)/(7x^2). please show calc involved

1. phi

rewrite it using a negative 1 exponent $\frac{4}{7} x^{-1}$ now use the power rule

2. phi

do you know the power rule? $\frac{d}{dx} x^n = n x^{n-1}$

3. anonymous

no i dont